Paste applicator for paper bag sleeves



Jan. l2, 1954 R. F. sEARLE 2,665,661

` PASTE APPLICATOR FOR PAPER BAG SLEEVES Filed Aug. 1e, 195o 2Smets-sheet 1 y L24 j j @um .m l

ATTORNEY Jan. 12, 1954 R. F, SEARLE 2,665,661

PASTE APFLICATOR FOR PAPER BAG SLEEVES Filed Aug. 18, 1950 2SheetsfSheet 2 "PIL infn 74'? Z 12 ,6 20 22 Il l, 13

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. Il" 'l Huhu INVENTQR lar [fifa/'Ze' n/ZKM ATToRNEY Patented Jan. 12,4,1954

PASTE APPLICATOR FOR PAPER BAG SLEEVES Robert F. Searle, Mobile, Ala.,assignor'to Arkell and Smiths, a corporation of New York ApplicationAugust is, 195o, serial No. 180,133

This invention relates to a paste applicator used in assemblingmultiwall valve bags of the type having an inserted sleeve such as aso-called tuck-in sleeve. This machine stamps a line of glue or paste onthe sleeve and makes it readily available for insertion into a bag.

The great convenience of my paste applicator is that there is no needfor an operator to daub the sleeve with glue before pasting it in a bag.It provides the operator with a supply of sleeves individually andfreshly glued when needed with the paste applied in a uniform manner.This uniform application of paste substantially climinates waste sleevesbecause each sleeve forms a continuous adhesion with the valve when theoperator inserts it into a bag. In addition, only the necessary amountof paste is applied to each sleeve, making my device economical as wellas efficient in operation.

Further advantages of this invention can be readily understood byreference to the accompanying drawing in which Fig. 1 is a perspectiveview of this invention; Fig. 2 is a side view showing the paste applyingrod and paste transfer rod in contact with a sleeve and the adhesiverespectively and Fig. 3 shows the rods in contact with each other.

Trough I carried by a suitable support (not shown) contains the adhesivesupply and mounts the various members of this invention. These include asleeve backing plate I2 with several spaced guide pins I4 positionedalong the lower portion of the plate. At its mid-section this plate hasa sleeve holding bar I6 mounted by a U-shaped rod I8 and supportingmember 20. Springs 22 mounted under tension on the arms of rod I8 tendto force holding bar I6 against the backing plate.

Sleeve 24 consists of a piece of paper or the like precut to a desiredform which depends upon the valve bag for which it is intended. Bygluing this sleeve to the under inside-edge portion of the V-shapedopening which forms the valve and folding it back over the valve flap, anozzle is formed by which the bag may be filled and sealed. Perfectsealing can only be achieved if the sleeve forms a continuous adhesionwith the valve. In my invention I insure this continuous adhesion byproviding for uniform application of the glue. I accomplish this byholding the sleeve in a flat position with bar I6 so that the glue canbe readily applied as a continuous strip across the surface of thesleeve.

To position sleeves 24 in readiness for gluing, holding bar I6 is pulledaway from backing plate I2 by U-shaped rod I8. A stack of sleeves isthen 4 Claims. (Cl. 118-243) placed between the holding bar and backingplate, with their lower edges resting upon guide pins I4. Guide pin I5,located above the main line of pins. in conjunction with supportingmember 20 insures positioning of the sleeves against the backing plate.So placed, the sleeves are then held flat against the backing plate andbar I6 is released. Under tension of springs 22 holding bar I6 maintainsthe sleeves in a perfectly flat and level position for gluing.

To supply the adhesive, I provide a paste applying rod 26 pivotallymounted on shaft 28 by arms 30 and a paste transfer rod 32 which is alsopivotally mounted on a shaft 34 by arms 36. These shafts are gearedtogether as indicated at 38 and connected to foot pedal 4I) by lever 42and arm 44 so that as foot pedal 40 is depressed the rods pivot inopposite directions until the paste applying rod stamps against thelower edge of sleeve 24 which is supported by backing plate I2. By thistime paste transfer rod 32 has pivoted into the adhesive (see Fig. 2).The rods are so mounted that as pressure on the foot pedal is released,spring 46 pulls them into contact with each other transferring freshpaste 0r glue from rod 32 to rod 26 (see Fig. 3). For this purpose, Iprefer to use knurled rods as shown which help to make the exchange ofglue more positive.

To insure the application of fresh adhesive to each sleeve I provide asmall gear 48 mounted on one end of rod 26 and a gear segment 50positioned to mesh with gear 48. These gears are adapted to roll rod 26over as it pivots away from rod 32 so that freshly transferred gluecontacts each sleeve.

While other means may be used for transferring glue to rod 26 I prefer apair of rods as described with each rod pivoting only one-half the totaldistance between the glue supply and the sleeve so as lto increase thespeed of operation. Obviously the width of the glue strip may be variedby changing rod diameters and only the necessary amount of glue for theparticular purpose at hand need be used. In the preferred form of myinvention shown., I provide the rear wall of trough I0 with a fillingpan 52 so that Ithe machine may be conveniently refilled while inoperation.

With this construction, manual handling of the sleeves is materiallyreduced because as many as from twenty-five to fifty sleeves may beeasily placed behind holding bar I 6 in readiness for gluing. They areautomatically positioned by guide pins I4 so that the line of adhesiveis uniformly spaced from the bottom edge of each sleeve. `r{"hisuniformity enables the operator to v quickly and accurately position thesleeve in a bag which tends to increase his production rate.

Thus by the simple expedient of depressing a foot pedal my pasteIapplicator makes a freshly glued sleeve readily available for theoperator to insert into a bag.

lit will .be understood lthat it is intended .to cover all ychangesand'modicationsof the preferred embodiment of the invention hereinchosen for the purpose of illustration which do not constitutedepartures from kthe .spirit .and scope of the invention. Y

What I claim is 1. A machine for applyingsadhesive to .asheet ofmaterial for forming a sleeve inthe valve-:of a multiwall paper bagcomprising, a rtrough to hold the adhesive, a plate mounted on one sideof said trough, means for holding a sheetV of sleeve-forming materialagainst said plate, a pair cof-rods pivotaily mounted in ,said trough.,means for swinging .said vrods into contact with each other above said.adhesive totransfer a substantially continuous line of adhesivelbetween thefrods said swinging .means being Yadapted to swing said rodsout of contactv with each ,other to move one rod into the adhesive .andto positively .force the second vrod against said vsleeve-- VformingAmaterial .tostamp a continuous line .of adhesive across the material.

2. A structureas specified vin claim '1. in which the rods have knurledsurfaces to insure transfer of adhesive. v

3. A structure as specified in claim l .including means for rolling said.second rod over as it moves toward .said sleeve-'forming .material `so'4 as to stamp a continuous line of freshly transferred adhesive uponthe material.

.4. A machine for applying adhesive to a sheet of material for forming asleeve in the valve of a multiwall -paper bag `comprising a trough tohold adhesive for application to said material, a plate mounted on oneside of said trough, means for 'holding a sheet of sleeve formingVmaterial against said plate, a rod pivotally mounted on the tro-ugh,means positioned in said trough for supplying a continuous line ofadhesive along substantially the entire length of the rod but only on aminor portion of the surface of said rod and on the side removed fromsaid plate, means forfswinging said rod between said adhesive supplyingmeans and sleeve-forming ma- .terial and for positively forcing said rodagainst the said adhesive supplying means and material onthe plate, andmeans for rolling said rod over as it moves from the adhesive supplyingmeans to bring the side of the rod which has the adhesive into contactwith vthe material so as to stamp a continuous line of freshlytransferred adhesive across the. material.

ROBERT F. SEARIE.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date .1,410,498 Murray Mar. 21, 1922 1,886,231 Sague Nov. 1, 19322,451,175 Riseberg Oct. 12, 1948 '2,515,750 Dansereau July 18,1950

lNheli'lOn et al. Aug. 8, 1950

